Download App

Organic Chemistry: Some Basic Principles and Techniques — Chemistry STD 11 Science — Question

Rajasthan BoardEnglish MediumSTD 11 ScienceChemistryOrganic Chemistry: Some Basic Principles and Techniques2 Marks
Question
A student was given the compound C6H4(NH2)SO3H for elemental analysis, while performing Lassaigne's test for 'N' what colour will he get and why?
✓

Answer

Blood red colouration, he will get because compound contains both N and S.
$\text{Na}+\text{S}+\text{C}+\text{N}\xrightarrow{\ \ \ \ \ \ \ \ \ \ }\text{NaSCN}$
$\text{Fe}+\text{3NaSCN}\xrightarrow{\ \ \ \ \ \ \ \ \ \ }\text{Fe}(\text{SCN})_3+3\text{Na}^+\\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \text{Blood red colour}$

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Explore more

More "2 Marks Questions" from Organic Chemistry: Some Basic Principles and Techniques→Organic Chemistry: Some Basic Principles and Techniques — all question types→Chemistry STD 11 Science question papers→Rajasthan Board STD 11 Science question papers→Rajasthan Board question paper generator→

Similar questions

A sample of drinking water was found to be severely contaminated with chloroform, CHCl3, supposed to be carcinogenic in nature. The level of contamination was 15ppm (by mass).
Determine the molality of chloroform in the water sample.
→
How many electron in an atom may have the following quantum numbers?
(a) $n =4, m_s=-1 / 2$
(b) $n =3, l=0$.
→
What is free radical? Explain and state the stability strength for free alkyl radicals.
→
What is buffer solution? It is of how many types?
→
What is the basic difference between the terms electron gain enthalpy and electronegativity?
→
Out of Cu2+, Fe2+ and Cr3+, which ion is most paramagnetic and why?
→
What are nodal planes and what will be the number of nodal planes for 4 s orbital?
→
What happens when 1, 2-Dibromo ethane reacts with excess of alc. KOH?
→
Arrange the following elements in the increasing order of non-metallic character. Give reason.
B, C, O, N, F
→
Predict the products of electrolysis in the following:
An aqueous solution AgNO3 with platinum electrodes.
→